(0 18 3)(1 16 14)(2 7 4)(5 20 15)(6 10 8)(9 13 12)(11 19 17)
ALLOWS (11/8)-SEQUENCE
1: (5 7 15)

(0 18 3)(1 16 14)(2 7 20 15 4)(5)(6 10 8)(9 13 12)(11 19 17)
2: (2 7 20)

(0 18 3)(1 16 14)(2 15 4)(5)(6 10 8)(7)(9 13 12)(11 19 17)(20)
3: (0 18 3)

(0)(1 16 14)(2 15 4)(3)(5)(6 10 8)(7)(9 13 12)(11 19 17)(18)(20)
4: (2 15 4)

(0)(1 16 14)(2)(3)(4)(5)(6 10 8)(7)(9 13 12)(11 19 17)(15)(18)(20)